add Object#pass method

[Nondv]

https://bugs.ruby-lang.org/issues/13172

Instead of #yield_self from https://bugs.ruby-lang.org/issues/12760

Just to see if it fits

[Nondv]

$ irb
>> Time.now.pass { |t| t.sunday? ? 'Yay!' : ':(' }
==> ":("

[DmitryDrobotov]

I don't see a real reason to have such method because

Time.now.sunday? ? 'Yay!' : ':('

gives the same result. Maybe, could you provide more explicit example where it will add cool syntactic sugar or better code efficiency?

[Nondv]

@DmitryDrobotov I've given 2 links to Redmine. Help yourself, please:)
People want it.

In the simplest case it helps handle long-name variables:

if application_default_user.male?
  "Mr. #{application_default_user.name}"
else
  "Ms. #{application_default_user.name}"
end

# vs
application_default_user.pass { |u| u.male? ? "Mr. #{u.name}" : "Ms. #{u.name}" }
# or 
application_default_user.yield_self { |u| u.male? ? "Mr. #{u.name}" : "Ms. #{u.name}" }

Of course, you can have complicated logic in a multiline block with many temporary variables (and they will exist only in block scope!) so it should help very much.

P.S. application_default_user isn't longest name by the way.

[znz]

This pull request can close, because yield_self added.

(I don't have permission to close.)